The graph of which function will have a maximum and a y-intercept of 4?
f(x) = 4x2 + 6x - 1
f(x) = -4x2 + 8x + 5
f(x) = -x2 + 2x + 4
f(x) = x2 + 4x - 4

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin. how many doctors use brand x aspirin

Yvaries inversely as x. y =12 when x=5. find y when x=4

Two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: what is the approximate distance, in feet, between the two poles? 6.93 feet 8.66 feet 12.32 feet 15.59 feet